/**
 * $RCSfile$
 * $Revision: 7071 $
 * $Date: 2007-02-12 08:59:05 +0800 (Mon, 12 Feb 2007) $
 *
 * Copyright 2003-2007 Jive Software.
 *
 * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jivesoftware.smackx.provider;

import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.provider.IQProvider;
import org.jivesoftware.smack.util.PacketParserUtils;
import org.jivesoftware.smackx.packet.DiscoverInfo;
import org.xmlpull.v1.XmlPullParser;

/**
 * The DiscoverInfoProvider parses Service Discovery information packets.
 * 
 * @author Gaston Dombiak
 */
public class DiscoverInfoProvider implements IQProvider {

	public IQ parseIQ(XmlPullParser parser) throws Exception {
		DiscoverInfo discoverInfo = new DiscoverInfo();
		boolean done = false;
		DiscoverInfo.Feature feature = null;
		DiscoverInfo.Identity identity = null;
		String category = "";
		String name = "";
		String type = "";
		String variable = "";
		discoverInfo.setNode(parser.getAttributeValue("", "node"));
		while (!done) {
			int eventType = parser.next();
			if (eventType == XmlPullParser.START_TAG) {
				if (parser.getName().equals("identity")) {
					// Initialize the variables from the parsed XML
					category = parser.getAttributeValue("", "category");
					name = parser.getAttributeValue("", "name");
					type = parser.getAttributeValue("", "type");
				} else if (parser.getName().equals("feature")) {
					// Initialize the variables from the parsed XML
					variable = parser.getAttributeValue("", "var");
				}
				// Otherwise, it must be a packet extension.
				else {
					discoverInfo.addExtension(PacketParserUtils
							.parsePacketExtension(parser.getName(),
									parser.getNamespace(), parser));
				}
			} else if (eventType == XmlPullParser.END_TAG) {
				if (parser.getName().equals("identity")) {
					// Create a new identity and add it to the discovered info.
					identity = new DiscoverInfo.Identity(category, name);
					identity.setType(type);
					discoverInfo.addIdentity(identity);
				}
				if (parser.getName().equals("feature")) {
					// Create a new feature and add it to the discovered info.
					discoverInfo.addFeature(variable);
				}
				if (parser.getName().equals("query")) {
					done = true;
				}
			}
		}

		return discoverInfo;
	}
}